Typically, you use VMware Converter to migrate virtual machines from other VMware products into your ESXi system. However, you can use the vmkfstools -i command to import virtual disks in 2gbsparse format into ESXi and then attach this disk to a new virtual machine you create in ESXi.

You must import the virtual disk first because you cannot power on disks in 2gbsparse format on the ESXi host.

Procedure
1

Import a disk in 2gbsparse format into the ESXi host by running the following command. Make sure to select the disk format compatible with ESXi.

vmkfstools -i <input> <output> -d <format>

2

Use the vSphere Client or the vSphere Web Client to attach the disk you imported to a virtual machine in ESXi.

For information, see the vSphere Virtual Machine Administration.